<template>
  <div>
    <h1>{{id?'编辑':'新建'}}文章 </h1>
    <el-form @submit.native.prevent="save" label-width="120px" label-position="right">
      <el-form-item label="所属分类">
        <el-select v-model="model.categories" placeholder="" multiple >
          <el-option v-for="item in categories" :key="item._id" :label="item.name" :value="item._id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="标题" >
        <el-input v-model="model.title" placeholder=""></el-input>
      </el-form-item>
      <el-form-item label="详情" >
        <vue-editor v-model="model.body" useCustomImageHandler @image-added="handleImageAdded"></vue-editor>
      </el-form-item>
      <el-form-item >
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import { VueEditor } from 'vue2-editor'
export default {
  components: {
    VueEditor
  },
  data () {
    return {
      model: {
        name: ''
      },
      // 所属分类
      categories: []
    }
  },
  props: {
    id: {}
  },
  methods: {
    // 点击按钮提交
    async save () {
      let res
      if (this.id) {
        // 编辑提交
        res = await this.$http.put(`rest/articles/${this.id}`, this.model)
      } else {
        // 新增提交
        res = await this.$http.post('rest/articles', this.model)
      }
      console.log(res)
      // 注意这里是前端页面路径，不需要加rest
      this.$router.push('/articles/list')
      this.$message.success('保存成功')
    },
    // 根据id获取编辑分类的信息
    async fetch () {
      const res = await this.$http.get(`rest/articles/${this.id}`)
      this.model = res.data
    },
    // 获取父级分类基本信息
    async fetchCategories () {
      const res = await this.$http.get('rest/categories')
      this.categories = res.data
    },
    // 使得富文本编辑器里面的图片变小
    async handleImageAdded (file, Editor, cursorLocation, resetUploader) {
      var formData = new FormData()
      // 因为服务端那边上传图片是file
      formData.append('file', file)
      const res = await this.$http.post('upload', formData)
      const url = res.data.url // Get url from response
      Editor.insertEmbed(cursorLocation, 'image', url)
      resetUploader()
    }
  },
  created () {
    this.id && this.fetch()
    this.fetchCategories()
  }
}
</script>
